-38.78% is the change from 312 to 191
Calculation steps:
[( 191 - 312 ) ÷ 312] x 100 = -38.78%
Formula
Percentage change = [(191 - 312) / 312] x 100
Subtract the new number by the original number
191 - 312 = -121
-121 ÷ 312 = -0.38782051282051283
-0.38782051282051283 x 100 = -38.78%